I've found that the rate channel sometimes has trouble with bounding boxes, specially when using rotoshapes to drive it. Have you tried setting the bbox to the resolution area? It's something to try, at least.
On Mon, Jun 23, 2014 at 7:01 PM, Frank Rueter|OHUfx <[email protected]> wrote: > hm, yeah, it does seem to work. yesterday's set up didn't for some > reason, but now it works better. > Forgot about the ParticleSetup node, that certainly helps. > For some reason I can't use a rate channel in combination with > emiter_order set to "randomly". All particles simply vanish when I do. > > Will have to work around that one for now. > Anyway, thanks for the reply. I really hope we will see some improvements > with the particle system, along with better rotational control and support > for clustering etc. > > > Cheers, > frank > > > On 24/06/14 02:05, Elias Ericsson Rydberg wrote: > > I think transfer velocity seems to work for this application? I made a > quick little test, but maybe it isnt what you are after. But maybe the > expression can be helpful. > > /Elias Ericsson Rydberg > > > 2014-06-23 10:07 GMT+02:00 Frank Rueter|OHUfx <[email protected]>: > >> Has anybody had success in setting up a particle system that "flicks" >> particles off an emitter? >> I need an effect that looks like when you flick paint of a paint brush, >> i.e. the emitter moves fast (card rotating 180 degrees), and I need it to >> emit particles that inherit it's speed when they are born. The "transfer >> velocity" knob seems to transfer velocity from the emitter to the particles >> even when they are already born and "detached" from it, which is kinda >> rubbish. >> Animating the "transfer velocity" knob doesn't work either (and it >> wouldn't help much anyway, since the animation would be global, not local >> and relative to each particle's life). >> >> Does anybody have any ideas how to achieve this? The only thing I can >> think of is giving the particles an initial speed and fudge it until it >> kinda looks like they are being flicked, but that always looks rubbish as >> well. A clever expression maybe? >> >> >> Cheers, >> frank >> >> >> -- >> [image: ohufxLogo 50x50] <http://www.ohufx.com> *vfx compositing >> <http://ohufx.com/index.php/vfx-compositing> | workflow customisation and >> consulting <http://ohufx.com/index.php/vfx-customising> * >> >> _______________________________________________ >> Nuke-users mailing list >> [email protected], http://forums.thefoundry.co.uk/ >> http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users >> > > > > _______________________________________________ > Nuke-users mailing [email protected], > http://forums.thefoundry.co.uk/http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > > > -- > [image: ohufxLogo 50x50] <http://www.ohufx.com> *vfx compositing > <http://ohufx.com/index.php/vfx-compositing> | workflow customisation and > consulting <http://ohufx.com/index.php/vfx-customising> * > > _______________________________________________ > Nuke-users mailing list > [email protected], http://forums.thefoundry.co.uk/ > http://support.thefoundry.co.uk/cgi-bin/mailman/listinfo/nuke-users > -- Jose Fernandez de Castro
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